内螺纹的收尾、肩距和退刀槽(GB/T3-1997) (mm)
|
|
|
螺距P
|
收 尾x max
|
肩 距Amax
|
退 刀 槽
|
|
G1
|
Dg
|
R≈
|
|
一般
|
短的
|
一般
|
长的
|
一般
|
短的
|
|
0.25
|
1
|
0.5
|
1.5
|
2
|
|
|
D+0.3
|
|
|
0.3
|
1.2
|
0.6
|
1.8
|
2.4
|
|
0.35
|
1.4
|
0.7
|
2.2
|
2.8
|
|
0.4
|
1.6
|
0.8
|
2.5
|
3.2
|
|
0.45
|
1.8
|
0.9
|
2.8
|
3.6
|
|
0.5
|
2
|
1
|
3
|
4
|
2
|
1
|
0.2
|
|
0.6
|
2.4
|
1.2
|
3.2
|
4.8
|
2.4
|
1.2
|
0.3
|
|
0.7
|
2.8
|
1.4
|
3.5
|
5.6
|
2.8
|
1.4
|
0.4
|
|
0.75
|
3
|
1.5
|
3.8
|
6
|
3
|
1.5
|
0.4
|
|
0.8
|
3.2
|
1.6
|
4
|
6.4
|
3.2
|
1.6
|
0.4
|
|
1
|
4
|
2
|
5
|
8
|
4
|
2
|
D+0.5
|
0.5
|
|
1.25
|
5
|
2.5
|
6
|
10
|
5
|
2.5
|
0.6
|
|
1.5
|
6
|
3
|
7
|
12
|
6
|
3
|
0.8
|
|
1.75
|
7
|
3.5
|
9
|
14
|
7
|
3.5
|
0.9
|
|
2
|
8
|
4
|
10
|
16
|
8
|
4
|
1
|
|
2.5
|
10
|
5
|
12
|
18
|
10
|
5
|
1.2
|
|
3
|
12
|
6
|
14
|
22
|
12
|
6
|
1.5
|
|
3.5
|
14
|
7
|
16
|
24
|
14
|
7
|
1.8
|
|
4
|
16
|
8
|
18
|
26
|
16
|
8
|
2
|
|
4.5
|
18
|
9
|
21
|
29
|
18
|
9
|
2.2
|
|
5
|
20
|
10
|
23
|
32
|
20
|
10
|
2.5
|
|
5.5
|
22
|
11
|
25
|
35
|
22
|
11
|
2.8
|
|
6
|
24
|
12
|
28
|
38
|
24
|
12
|
3
|
|
参考值
|
＝4P
|
＝2P
|
≈（6～5）P
|
≈（8～6.5）P
|
＝4P
|
＝2P
|
—
|
≈0.5P
|
注: 1.应优先选用“一般”长度的收尾和肩距;容屑需要较大空间时可选用“长”肩距,结构限制时可选用“短”收尾。
2.“短”退刀槽仅在结构受限制时采用。
3.Dg公差为H13。
4.D为螺纹公称直径代号。
